@article{ref1,
title="A study of bipolar (manic-depressive) and unipolar recurrent depressive psychoses. I. Genetic investigation",
journal="Acta psychiatrica Scandinavica. Supplementum",
year="1966",
author="Perris, C.",
volume="194",
number="",
pages="15-44",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0065-1591",
doi="",
url="http://dx.doi.org/"
}